Generify two Mac Valgrind suppressions and add one more from yesterday's gtest/gmock roll.

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing.
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 813 matching lines @@
    bug_39282
    Memcheck:Leak
    fun:malloc_zone_calloc
    fun:_internal_class_createInstanceFromZone
    fun:NSAllocateObject
    fun:+[NSProxy alloc]
    fun:+[OCMockObject mockForClass:]
    fun:_ZN40BookmarkFolderTargetTest_ReopenSame_Test8TestBodyEv
 }
 {
-   bug_39342
+   bug_39381
    Memcheck:Leak
    fun:_Znw*
    fun:_ZNK7testing8internal11ThreadLocalISt6vectorINS0_9TraceInfoESaIS3_EEE16GetOrCreateValueEv
    fun:_ZN7testing8internal11ThreadLocalISt6vectorINS0_9TraceInfoESaIS3_EEE7pointerEv
    fun:_ZN7testing8internal12UnitTestImpl17gtest_trace_stackEv
-   fun:_ZN7testing8UnitTest14PushGTestTraceERKNS_8internal9TraceInfoE
-   fun:_ZN7testing8internal11ScopedTraceC2EPKciRKNS_7MessageE
-   fun:_ZN7testing8internal11ScopedTraceC1EPKciRKNS_7MessageE
    ...
 }
 {
-   bug_39352
+   bug_39381
    Memcheck:Leak
    fun:_Znw*
    fun:_ZNK7testing8internal11ThreadLocalIPNS_8SequenceEE16GetOrCreateValueEv
    fun:_ZNK7testing8internal11ThreadLocalIPNS_8SequenceEE7pointerEv
    fun:_ZNK7testing8internal11ThreadLocalIPNS_8SequenceEE3getEv
-   fun:_ZN7testing10InSequenceC2Ev
-   fun:_ZN7testing10InSequenceC1Ev
-   fun:_ZN11webkit_glue26BufferedResourceLoaderTest5StartEv
    ...
 }
 {
+   bug_39381
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZNK7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEE16GetOrCreateValueEv
+   fun:_ZNK7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEE7pointerEv
+   fun:_ZNK7testing8internal11ThreadLocalIPNS_31TestPartResultReporterInterfaceEE3getEv
+   fun:_ZN7testing8internal12UnitTestImpl41GetTestPartResultReporterForCurrentThreadEv
+   ...
+}
+{
    bug_39376
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9__gnu_cxx13new_allocatorISt13_Rb_tree_nodeISt4pairIKN3net9HostCache3KeyE13scoped_refptrINS4_5EntryEEEEE8allocateEmPKv
    fun:_ZNSt8_Rb_treeIN3net9HostCache3KeyESt4pairIKS2_13scoped_refptrINS1_5EntryEEESt10_Select1stIS8_ESt4lessIS2_ESaIS8_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeIN3net9HostCache3KeyESt4pairIKS2_13scoped_refptrINS1_5EntryEEESt10_Select1stIS8_ESt4lessIS2_ESaIS8_EE14_M_create_nodeERKS8_
    fun:_ZNSt8_Rb_treeIN3net9HostCache3KeyESt4pairIKS2_13scoped_refptrINS1_5EntryEEESt10_Select1stIS8_ESt4lessIS2_ESaIS8_EE9_M_insertEPSt18_Rb_tree_node_baseSG_RKS8_
    fun:_ZNSt8_Rb_treeIN3net9HostCache3KeyESt4pairIKS2_13scoped_refptrINS1_5EntryEEESt10_Select1stIS8_ESt4lessIS2_ESaIS8_EE13insert_uniqueERKS8_
    fun:_ZNSt8_Rb_treeIN3net9HostCache3KeyESt4pairIKS2_13scoped_refptrINS1_5EntryEEESt10_Select1stIS8_ESt4lessIS2_ESaIS8_EE13insert_uniqueESt17_Rb_tree_iteratorIS8_ERKS8_
    fun:_ZNSt3mapIN3net9HostCache3KeyE13scoped_refptrINS1_5EntryEESt4lessIS2_ESaISt4pairIKS2_S5_EEE6insertESt17_Rb_tree_iteratorISA_ERKSA_
    fun:_ZNSt3mapIN3net9HostCache3KeyE13scoped_refptrINS1_5EntryEESt4lessIS2_ESaISt4pairIKS2_S5_EEEixERS9_
    fun:_ZN3net9HostCache3SetERKNS0_3KeyEiNS_11AddressListEN4base9TimeTicksE
    fun:_ZN3net16HostResolverImpl13OnJobCompleteEPNS0_3JobEiRKNS_11AddressListE
    fun:_ZN3net16HostResolverImpl3Job16OnLookupCompleteEv
 }